Réponse :
Explications étape par étape
Bonsoir
A = -2/3 x 6/-8 - 2/5 : -3/-5
A = 2/8 x 6/3 - 2/5 x 5/3
A = 2/(2 x 4) x (2 x 3)/3 - 2/3 x 5/5
A = 1/4 x 2 - 2/3
A = 2/4 - 2/3
A = 2/(2 x 2) - 2/3
A = 1/2 - 2/3
A = (1 x 3)/(2 x 3) - (2 x 2)/(3 x 2)
A = 3/6 - 4/6
A = -1/6
B = 2/3 : (-1/3) : 3/-4 + 1/-2
B = 2/3 / (-1/3) / (-3/4) - 1/2
B = 2/3 x -3 / (-3/4) - 1/2
B = -3/3 x 2 / (-3/4) - 1/2
B = -2 x -4/3 - 1/2
B = 8/3 - 1/2
B = (8 x 2)/(3 x 2) - (1 x 3)/(2 x 3)
B = 16/6 - 3/6
B = 13/6
